Notes: All timings are represented in 24+ hour notation in local time of Fairfield, United States with DST adjustment (if applicable).
Hours past midnight are higher than 24:00 and fall on next day. In Panchang day starts and ends with sunrise.
Pradosha Vrat is observed on both Trayodashi Tithis, i.e. Shukla Paksha Trayodashi and Krishna Paksha Trayodashi, in lunar month. For Pradosham Vrat, day is fixed when Trayodashi Tithi falls during Pradosha Kala which starts after Sunset. The time window after Sunset when Trayodashi Tithi and Pradosha time overlaps is auspicious for Shiva Puja.
When Pradosham day falls on Sunday, it is known as Ravi Pradosha. Ravi Pradosha Vrat is considered highly important to get rid of Pitru Dosha. Devotees of Lord Shiva observe the Pradosha fast on this day with devotion. Sunday is governed by Lord Surya and therefore Surya Pradosha Vrat is recommended for those seeking relief from problems related to the Surya in their Kundali.
This fast is considered beneficial for attaining longevity, good health and social respect. The one who observes the Ravi Pradosha Vrat with full devotion gains family happiness, inner strength and social honor. This fast is especially fruitful for those who are struggling with a lack of self-confidence.